Implement button padding in layout and use it in ButtonStrip

 src/layout.rs                    | 50 ++++++++++++++++++++++++++++++++--------
 src/widget/input/button_strip.rs |  8 +++----
 2 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/src/layout.rs b/src/layout.rs
index 706675e..f2b6360 100644
--- a/src/layout.rs
+++ b/src/layout.rs
@@ -45,7 +45,7 @@ static NESTED_SECTION_LABEL_FONT: RwLock<String> = RwLock::new(String::new());
 static PAGINATOR_TAB_MARGIN_X: RwLock<f32> = RwLock::new(5.0);
 static PAGINATOR_TAB_MARGIN_Y: RwLock<f32> = RwLock::new(10.0);
 static PAGINATOR_TAB_PADDING_X: RwLock<f32> = RwLock::new(10.0);
-static PAGINATOR_TAB_PADDING_Y: RwLock<f32> = RwLock::new(14.0);
+static BUTTON_PADDING: RwLock<f32> = RwLock::new(14.0);
 
 static PLATE_PADDING: RwLock<f32> = RwLock::new(20.0);
 static DROPDOWN_HEIGHT: RwLock<f32> = RwLock::new(44.0);
@@ -287,11 +287,19 @@ pub fn reload_config() {
                     }
                 }
             }
-            if let Some(rest) = trimmed.strip_prefix("paginator_tab_padding_y") {
+            if let Some(rest) = trimmed.strip_prefix("button_padding") {
                 let rest = rest.trim_start_matches(|c: char| c == ' ' || c == '=' || c == '"');
                 let val_str = rest.trim_end_matches('"').trim();
                 if let Ok(val) = val_str.parse::<f32>() {
-                    if let Ok(mut lock) = PAGINATOR_TAB_PADDING_Y.write() {
+                    if let Ok(mut lock) = BUTTON_PADDING.write() {
+                        *lock = val;
+                    }
+                }
+            } else if let Some(rest) = trimmed.strip_prefix("paginator_tab_padding_y") {
+                let rest = rest.trim_start_matches(|c: char| c == ' ' || c == '=' || c == '"');
+                let val_str = rest.trim_end_matches('"').trim();
+                if let Ok(val) = val_str.parse::<f32>() {
+                    if let Ok(mut lock) = BUTTON_PADDING.write() {
                         *lock = val;
                     }
                 }
@@ -1053,34 +1061,58 @@ pub fn set_paginator_tab_padding_x(padding: f32) {
     }
 }
 
-pub fn paginator_tab_padding_y() -> f32 {
+pub fn button_padding() -> f32 {
     use std::sync::Once;
     static INIT: Once = Once::new();
     INIT.call_once(|| {
         if let Some(content) = read_config() {
+            let mut found = false;
             for line in content.lines() {
                 let trimmed = line.trim();
-                if let Some(rest) = trimmed.strip_prefix("paginator_tab_padding_y") {
+                if let Some(rest) = trimmed.strip_prefix("button_padding") {
                     let rest = rest.trim_start_matches(|c: char| c == ' ' || c == '=' || c == '"');
                     let val_str = rest.trim_end_matches('"').trim();
                     if let Ok(val) = val_str.parse::<f32>() {
-                        if let Ok(mut lock) = PAGINATOR_TAB_PADDING_Y.write() {
+                        if let Ok(mut lock) = BUTTON_PADDING.write() {
                             *lock = val;
+                            found = true;
+                        }
+                    }
+                }
+            }
+            if !found {
+                for line in content.lines() {
+                    let trimmed = line.trim();
+                    if let Some(rest) = trimmed.strip_prefix("paginator_tab_padding_y") {
+                        let rest = rest.trim_start_matches(|c: char| c == ' ' || c == '=' || c == '"');
+                        let val_str = rest.trim_end_matches('"').trim();
+                        if let Ok(val) = val_str.parse::<f32>() {
+                            if let Ok(mut lock) = BUTTON_PADDING.write() {
+                                *lock = val;
+                            }
                         }
                     }
                 }
             }
         }
     });
-    *PAGINATOR_TAB_PADDING_Y.read().unwrap()
+    *BUTTON_PADDING.read().unwrap()
 }
 
-pub fn set_paginator_tab_padding_y(padding: f32) {
-    if let Ok(mut lock) = PAGINATOR_TAB_PADDING_Y.write() {
+pub fn set_button_padding(padding: f32) {
+    if let Ok(mut lock) = BUTTON_PADDING.write() {
         *lock = padding;
     }
 }
 
+pub fn paginator_tab_padding_y() -> f32 {
+    button_padding()
+}
+
+pub fn set_paginator_tab_padding_y(padding: f32) {
+    set_button_padding(padding);
+}
+
 pub fn textbox_height() -> f32 {
     use std::sync::Once;
     static INIT: Once = Once::new();
diff --git a/src/widget/input/button_strip.rs b/src/widget/input/button_strip.rs
index 1c856ad..5445ce8 100644
--- a/src/widget/input/button_strip.rs
+++ b/src/widget/input/button_strip.rs
@@ -103,7 +103,7 @@ impl ButtonStrip {
             };
 
             let r = self.item_rect(i);
-            let padding_y = crate::layout::paginator_tab_padding_y();
+            let padding_y = crate::layout::button_padding();
             let y_offset = if has_icon { 2.0 * padding_y + 12.0 } else { 0.0 };
             let usable_h = (r.3 - y_offset).max(1.0);
 
@@ -187,7 +187,7 @@ impl ButtonStrip {
                 } else {
                     trimmed
                 };
-                let padding_y = crate::layout::paginator_tab_padding_y();
+                let padding_y = crate::layout::button_padding();
                 let y_offset = if has_icon { 2.0 * padding_y + 12.0 } else { 0.0 };
                 let text_w = TextLabel::estimate_width(label_text, 12.0);
                 (text_w + y_offset).max(1.0)
@@ -331,7 +331,7 @@ impl Element for ButtonStrip {
                     let page_name = &self.buttons[i];
                     let trimmed = page_name.trim();
                     let has_icon = trimmed.find(' ').is_some();
-                    let padding_y = crate::layout::paginator_tab_padding_y();
+                    let padding_y = crate::layout::button_padding();
                     let y_offset = if has_icon { 2.0 * padding_y + 12.0 } else { 0.0 };
 
                     for &(qx, qy, qw, qh, qc) in &self.tab_text_quads[i] {
@@ -369,7 +369,7 @@ impl Element for ButtonStrip {
                     if !icon.is_empty() {
                         let icon_font_size = 14.0;
                         let est_icon_w = TextLabel::estimate_width(icon, icon_font_size);
-                        let padding_y = crate::layout::paginator_tab_padding_y();
+                        let padding_y = crate::layout::button_padding();
                         let icon_y = r.1 + (padding_y - 2.0).max(0.0);
                         labels.push(TextLabel {
                             text: icon.to_string(),